Cernotina falcata, Barcelos, Patrik, Camargos, Lucas Marques De, Pes, Ana Maria & Salles, Frederico Falcão, 2013

Barcelos, Patrik, Camargos, Lucas Marques De, Pes, Ana Maria & Salles, Frederico Falcão, 2013, Six new species of Cernotina Ross, 1938 (Trichoptera: Polycentropodidae) from Brazil, Zootaxa 3669 (2), pp. 115-128 : 120-122

Cernotina falcata sp. nov. Camargos, Barcelos-Silva & Pes

( Figs. 4 A–D).

Etymology. The adjective falcata refers to the sickle shape of the ventromesal lobe of each preanal appendage in lateral view, where falcata (Latin) = sickle-shaped, hooked.

Diagnosis. The distinctive sickle-like ventromesal lobe of each preanal appendage is similar to the dorsolateral lobe of other species, like Cernotina cygnea Flint 1971 , but the basodorsal lobe of each inferior appendage is very short, barely visible, in the new species, and half as long as the inferior appendages in C. cygnea . The species resembles C. abbreviata Flint 1971 , both with the curved structure resembling a sickle, but in the later species, this curved structure with a spike in the apex is tergum X, whereas in C. falcata sp. nov., it is the ventromesal lobe of a preanal appendage.

Description. Male. Length of each forewing 3.0– 3.2 mm (n = 3). General color, in alcohol, yellowish brown; antennae pale yellow, tibia and tarsus of each foreleg with short dark brown setae, mid- and hind legs with golden setae.

Male genitalia: Sternum IX trapezoidal, anterior margin deeply excavated and posterior margin slightly narrower than middle portion in ventral view ( Fig. 4 C). Tergum X membranous, asymmetrical, with rounded apex in dorsal view ( Fig. 4 B). Preanal appendages each composed of two lobes, in lateral view with dorsolateral lobe bifurcated apically, superior branch rounded, inferior branch longer than superior, with two stout, black, apical spines, one apical and the other subapical; ventromesal lobe broad basally with small posteroventral protuberance, and tapering apex strongly curved above dorsolateral lobe and then ventrad, slender apically with stout, black, apical spine ( Fig. 4 A). Inferior appendages in lateral view slightly curved downward and fusiform, covered by fine setae; basodorsal lobe very short, bearing some fine setae ( Fig. 4 A); apicomesal lobe sclerotized, claw-like in ventral view. Phallus tubular and sinuous, base broader than apex, with long internal spine in subapical region (phallus not expanded) ( Fig. 4 D).

Female: Unknown.

Holotype male: BRAZIL: Goiás; Niquelândia; Fazenda Horto Aranha, Anglo American/Codemin; 14°24’8.28”S, 48°43’40.19”W; 15–16.ix.2012; L.M. de Camargos, M.C. Almeida, and C.E.K. de Oliveira; Pennsylvania trap [alcohol]; (INPA).

Paratypes: Same data as holotype, 1 male (INPA); same data as holotype, 1 male (MZSP).

Biology. The specimens were collected in a narrow stream in a forest fragment of Cerrado vegetation. The stream has a sandy bottom with small rocks and leaves.

Figures

FIGURE 4. Cernotina falcata sp. nov. A) Male genitalia, left lateral; B) terga IX and X, and preanal appendages, dorsal; C) sternum IX and inferior appendages, ventral; D) phallus, left lateral.